[3] It’s not Tim Matheson or Kate Capshaw’s fault. Really, it isn’t. Both of them are plenty attractive and charismatic to carry a film like this. The problem is that A Little Sex is a boiled-down reduction of every rom-com ever made. Matheson plays a guy who talks his long-time female buddy (Capshaw) into getting married. But since he can’t keep his wiener zipped up, …